wxWidgets实现无标题栏窗口拖动效果

#pragma once
#include <wx/wx.h>
 
class MyTitleWnd:public wxFrame
{
public:
 MyTitleWnd(wxWindow *parent,wxWindowID id=wxID_ANY);
 virtual ~MyTitleWnd();
 void OnMouseMove(wxMouseEvent& event);
 void OnMouseLeave(wxMouseEvent& event);
 void OnMouseLDown(wxMouseEvent& event);
 void OnMouseLUp(wxMouseEvent& event);
 void OnMouseCaptureLost(wxMouseCaptureLostEvent& event);
private:
 wxPoint mLastPt;
 
 wxString mText;
 DECLARE_EVENT_TABLE()
};

#include "MyTitleWnd.h"
 
BEGIN_EVENT_TABLE(MyTitleWnd, wxFrame)
 EVT_MOUSE_CAPTURE_LOST(MyTitleWnd::OnMouseCaptureLost)
 //EVT_LEFT_DOWN(MyTitleWnd::OnMouseLDown)
 EVT_LEFT_UP(MyTitleWnd::OnMouseLUp)
 EVT_MOUSE_EVENTS(MyTitleWnd::OnMouseMove)
 EVT_LEAVE_WINDOW(MyTitleWnd::OnMouseLeave)
END_EVENT_TABLE()
 
MyTitleWnd::MyTitleWnd(wxWindow *parent, wxWindowID id/*=wxID_ANY*/)
 :wxFrame(parent, id,"", wxDefaultPosition, wxDefaultSize, wxBORDER_NONE)
{
 
}
 
MyTitleWnd::~MyTitleWnd()
{
}
 
void MyTitleWnd::OnMouseMove(wxMouseEvent &event)
{
 if(event.LeftIsDown()&&event.Dragging())
 {
 wxPoint pt = event.GetPosition();
 wxPoint wndLeftTopPt = GetPosition();
 int distanceX = pt.x - mLastPt.x;
 int distanceY = pt.y - mLastPt.y;
 
 wxPoint desPt;
 desPt.x = distanceX + wndLeftTopPt.x;
 desPt.y = distanceY + wndLeftTopPt.y;
 this->Move(desPt);
 
 }
 
 if (event.LeftDown())
 {
 this->CaptureMouse();
 mLastPt = event.GetPosition();
 }
}
 
void MyTitleWnd::OnMouseLeave(wxMouseEvent& event)
{
 if (event.LeftIsDown() && event.Dragging())
 {
 wxPoint pt = event.GetPosition();
 wxPoint wndLeftTopPt = GetPosition();
 int distanceX = pt.x - mLastPt.x;
 int distanceY = pt.y - mLastPt.y;
 
 wxPoint desPt;
 desPt.x = distanceX + wndLeftTopPt.x;
 desPt.y = distanceY + wndLeftTopPt.y;
 this->Move(desPt);
 
 }
}
 
void MyTitleWnd::OnMouseLDown(wxMouseEvent& event)
{
 this->CaptureMouse();
}
 
void MyTitleWnd::OnMouseLUp(wxMouseEvent& event)
{
 if (HasCapture())
 ReleaseMouse();
}
 
void MyTitleWnd::OnMouseCaptureLost(wxMouseCaptureLostEvent& event)
{
 if (HasCapture())
 ReleaseMouse();
}